Ametek 682T-HP, User Manual

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Chapter 7: Alarms & I/O Configuration, Page 86
M o d e l 6 8 2 T - H P U S E R M A N U A L A T E X Z o n e 2
If an alarm is acknowledged before the alarm condition is corrected, the alarm icon
(triangle warning) will persist. The only way to clear this icon is to correct the alarm
condition and cycle the power or press the “RESET ALL” button on the Alarm screen.
Alarms may be disabled temporarily for troubleshooting purposes by pressing the
“ENABLED” button on this screen until it shows “DISABLED”. The alarms will
automatically re-enable after 5 minutes (300 seconds) if the button is not pressed again.
7.1.1 Leak in Cabinet
This unit is equipped with a capacitive sensor that will detect a leak inside the
sampler. Should a leak develop, the XRT/XRA Head will stop any analysis that
is underway and any valves controlled by the system will automatically close.
This protects the XRT/XRA Head against damage from the leaking solution.
Additionally the system display will warn that a leak has been detected. The
system will not operate until the leak is corrected and the alarm is cleared. Refer
to Section
5.4 Leak Sensor to adjust the leak sensor.
7.1.2 Exceeding Maximum Temperature
If the monitored temperatures for the XRT/XRA Head, Flow Cell, or Cabinet
exceed their set maximum temperatures, the system will stop analysis and warn
with the appropriate temperature for whichever sensor has triggered the alarm.
The XRT/XRA Head temperature is the most critical, although an increase in
the Flow Cell or Cabinet temperatures may contribute to a Head temperature
alarm.
Verify that the process stream is not over temperature. Make sure that the area is
safe to open the analyzer door. Open the door and make sure the heater (if
provided) is not set above the desired temperature. If a remote display for the
Densitometer is included, check the display to verify that the fluid and shell
(cabinet) temperatures agree with the reported temperatures on the Touch Panel.
If the thermocouple that actually senses the temperature is disconnected, the
reported temperature will be 3276.7°C. Check the PLC thermocouple module.
Blinking red lights on this module indicate broken thermocouple connections.
If all temperatures seem normal except for the XRA/XRT Head, contact
AMETEK for technical assistance.
7.1.3 No X-rays/No Counts
If there is a problem with the X-ray generation or detection, the system display
will warn “No X-rays” or “X-rays exceeding maximum”. This may indicate
there is no power to the X-ray tube or the detector is noisy or saturated. If there
is a problem with the X-ray detection, the system display will warn “No Counts
Detected” or X-rays exceeding maximum”.
First check that the reported density is between 0.6 and 1.2 g/cc. If the Flow
Cell is empty, the density should be very low and the X-rays should be off. If
the Flow Cell is full, follow appropriate procedures to open the electronics
enclosure and verify that the X-ray light on the XRT/XRA head is on. If there is
no light, verify that the interlock is engaged (small micro-switch which opens if
the XRT/XRA head is moved away from the flow cell). Check all the
connections.
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